Chop chicken into 1" pieces. Set your Instant Pot on the saute setting and add 2 tbsp butter; melt. Add chicken and brown for 5-8 minutes, seasoning with salt and pepper.
Once chicken is browned, add onion and cook until soft and translucent. Add garlic and cook for about a minute.
Add rice and stir until coated in butter. Cook rice for 2-3 minutes, until it starts to turn golden and smell fragrant. Add chicken broth.
Lock lid on your Instant Pot and set for manual cooking, high pressure, for 8 minutes. Once cook cycle is over, quick release the pressure.
Once cook cycle is over and lid is released, stir in soup and cheese until melted and creamy.